AIS AI2524 Set the Packet Numbering Modulo, Set the X.121 Address, Restarts the packet service

Chapter 12: AI2524 X.25 Configuration Steps

x25 lic 5

x25 hic 20

x25 ltc 25

Set the Packet Numbering Modulo

The AI2524 implementation of X.25 supports both modulo 8 and mod- ulo 128 packet sequence numbering; module 8 is the default.

In interface configuration mode, set the packet numbering modulo:

x25 modulo {8 128}

Note:	Because the X.25 protocol requires the DTE and DCE to
	have identical modulos, changes you make to the modulo
	when the interface is up are held until the X.25 protocol
	restarts the packet service.

The X.25 modulo and the LAPB modulo are distinct and serve differ- ent purposes. LAPB modulo 128 (or extended mode) can be used to achieve higher throughput across the DTE or DCE interface; it affects only the local point of attachment. X.25 Packet-Level Protocol (PLP) modulo 128 can be used to achieve higher end-to-end throughput for virtual circuits by allowing more data packets to be in transit through the X.25 network.

Set the X.121 Address

If your router does not originate or terminate calls but only participates in X.25 switching, this task is optional. However, if the router is at tached to a PDN, you must set the interface X.121 address assigned by the X.25 network service provider.

In interface configuration mode, set the X.121 address:

x25 address x121-address

August 1997	Page 12-5
2524UM